/* 进入动画 */
.book-enter {
	transform: translateX(150px);
	opacity: 0;
}
.book-enter-active {
	transform: translateX(0);
	opacity: 1;
	transition: all 1s ease;
}
/* 离开动画 */
.book-exit {
	transform: translateX(0);
	opacity: 1;
}
.book-exit-active {
	transform: translateX(150px);
	opacity: 0;
	transition: all 1s ease;
}

